Azure AKS VMSS as node pool - How to change Storage Type of OS disk from Premium SSD to Standard HDD

Question

Dear team,

Using Terraform + ARM template - for Azure AKS with VMSS as node pool - Please help me know how to change Storage Type of OS disk from Premium SSD to Standard HDD.

I could not find any information in https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster or in https://learn.microsoft.com/en-us/azure/aks/learn/quick-kubernetes-deploy-rm-template?tabs=azure-cli.

Thank you for your support. Awaiting a swift and useful response as usual please.

Answer 1

@Balachandran, Karthikeyan you cannot directly chose the osdisk like Premium SSD or Standard HDD from aks create or terraform

you need to specify parameter --node-vm-size Standard_DS3_v2 based on this vm size it will reflect on the storage os disk

default_node_pool {
    name       = "default"
    node_count = 1
    vm_size    = "Standard_D2_v2"
  }

you can see the specs here

https://learn.microsoft.com/en-us/azure/virtual-machines/dv2-dsv2-series#dsv2-series

Premium Storage: Supported

related https://stackoverflow.com/questions/57094312/azure-aks-cluster-node-disk-type

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